Improvement in machines for grinding calender-rolls



E. E. LATHAM & 11.3mm. MACHHTES FOR GRINDING C ALENDER-ROLLS.

Patented July 31,1877.

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a @W WW mom-Lifiooabnsn. WASHINGTON D c TTNITEn EUGENE E. LATHAM ANDROBERT BINNS, OF SOUTH WINDHAM, CONN.

IMPROVEMENT l N MACHINES FUR GRINDENG CAL ENDER-ROLLS.

Specification forming part of Letters Patent No. 193,715, dated July 31,1877; application filed June 30, 1877.

- To all whom it may concern:

Beit known that we, EUGENE E. LATHAM and RoBERT BINNS, both of SouthWindham, in the county of Windham and State of Connecticut, haveinvented certain new and useful Improvements in Machine for GrindingCalender- Rolls, of which the following is a specification:

Our invention consists in the peculiar construction and combination ofparts, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a plan view of a machine whichembodies our invention, and Fig. 2is a transverse section of the same online a: w of Fig. 1.

The invention has for its objects the grinding of calender and otherrolls with great accuracy and by less labor than heretofore.

As in other machines for a like purpose, we employ a carriage, A, movingon ways, and operated by an automatic feed-screw, a. Said carriage isalso provided with two grindingwheels, B B, each provided withadjustingscrews bb. The rollO (the object to be ground) is placed on itsown bearings, in proper supports cc, between the head and tail blocks 1)and E of a lathe, and rotary motion imparted to the roll and a travelingmovement to the carriage, all in a well-known manner; but, unlike allprior machines, we construct the ways of the lathe and the Vs of thecarriage as follows, viz:

We first make a strong iron bed, F, which we call the main bed, and thentwo skeletonbeds, G G, the upper side of which contains the ways (1 c,the way d being for the head.

and tail block to slide upon, and the way 6 for the carriage A. The waysare all planed up as straight as is practicable, and then theseskeleton-beds are set upon the main bed F, parallel to each other, andsecured thereto at each end. The carriage A is constructed with a V atone end, formed in the solid metal of said carriage, and of an angle tocorrespond with the sides of the ways 6. At the opposite end of thecarriage a like is formed in a shoe, f, upon which that end of thecarriage rests. This shoe is so confined bylugs at each end that it mustmove endwise with the carriage, but is not confined so but that thecarriage may move sidewise independent of the shoe, so as to compensatefor any variation of distance between the ways 0 c at points along thelength of the beds. We place studs or projections g on the main bed F,and between the rails containing the ways (1 and c, said rails beingrigidly connected together by proper stays h h. These studs are placedat different points along the length of the beds-say, in a full-sizedmachine, about once in two feet. The sides of these studs are inclined,as shown, to correspond to the inclined sides of the wedges k k, thestraight sides of the wedges being in contact with the rails of theskeleton-beds G- G, upon which the ways'are formed. By loosening theinner one of the wedges k, and driving the outer one farther in, the way0 may be sprung outward. By loosening the outer one of the wedges, anddriving'in the inner wedge, the way 6 may be sprung inward, the tworails of the skeleton-beds G G being connected by stays, as beforedescribed, so that springing one rail near one of the stays necessarilysprings the other with it. To prepare the machine for grinding rolls, aroll, 0, is properly placed in the ordinary manner, and the carriagebrought toward one end of the lathe, with the grinding-wheels B -Bopposite one end of the roll 0, the lathe set in motion to rotate saidroll, andthe grindingwheels adjusted until they both just come incontact with it. The carriage is then moved along, and in case eithergrinding-wheel ceases to remain in contact with the roll, a deviationfrom a straight line is detected. The carriage is, of course, governedmainly by the way upon which the solid V rides, which we will suppose ison the front side of the machine. In case the rear grinding-wheel is theone out of action, then the wedges K are adjusted to spring the frontway outward toward the front until the rear grinding-wheel is againincontact with the roll. In the act of springing the way sidewise, thecarriage moves slightly on the shoe f, so as not to raise that end,whereas in case both ends of the carriage were provided with a solid Vwithout the shoe, the springing of one of the ways 0 without alsospringing its fellow would have a tendency to make one end of thecarriage rise upward on the inclined sides of the way and V, and therebythrow one grinding-wheel out of or into contactwith the roll, so thatthe deviation from a straight line in the way could not be accuratelytested by contact of both grinding= riage back and forth from one end tothe other of said roll, which will indicate that the front one of theways 0 is straight. Both of the wedges in each pair should be driveninsnugly, so as to prevent the way afterward springing in eitherdirection. After straightening the front way the carriage may then bechanged end for end, so that the solid v rides upon the rear way, andthat may be straightenedin like manner when the machine is in acondition to be set to work. and the roll will bev ground automaticallyand with great. accuracy.

In order to more conveniently reverse the carriage, the nut throughwhich the feed-screw passes may be made detachable from the carriage.

We have herein specified wedges as the means of'springing the rails; butit is evident that .the same result may be accomplished by a mainbed,skeleton-beds, and screws or cams 'for springing the skeleton-bedsto straighten the ways in the manner described.

It is well known that it is impracticable to plane a long way perfectlystraight, and. the same arrangement of main bed, skeleton-beds, andmeans for springing the latter upon the former, may be advantageouslyemployed in other than grinding-lathes for the purpose of straighteningthe ways, and, if desired, an indicator which will greatly multiply alldeviv ation from a straight, line may be employed to detect theirregularities.

We claim as our invention- 1. The main bed F, in combination with theskeleton-beds G G, bearing-Ways e e, and mechanism for springing thelatter upon the former, and retaining the same in place when so sprung,substantially as described, and for the purpose set forth. g

2. The main bed F,skeleton-beds-GG,bearing-ways e e, wedges 70 k, or theequivalent of said wedges, in combination with the carriage Aand shoefioperating together substantially as described, and for the purposespecified.

EUGENE E. LATHAM. ROBERT BINNS.

Witnesses for Latham:

J. W. JOHNSON, JOHN F. LAFLIN.

Witnesses for Binns:

. HUBER CLARK,

MILO B. SHARP.

